Method and apparatus for removing obstructions in the mines
US7047886B2 · kind B2 · utility
2Cited by
38References
24Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Nov 2, 2001 |
| Grant date | May 23, 2006 |
| Priority date | — |
| Expiry date | Nov 2, 2021 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF42D3/00
- WIPO fieldOther special machines
- WIPO sectorMechanical engineering
Abstract
The present invention is directed to a system for fragmenting rock obstacles and obstructions in mines. The system uses a projectile having a flat or concave nose and a detonating device that has a safety pin to prevent a striker from prematurely igniting the primer during handling of the projectile. The primer is designed to initiate a detonator which detonates an explosive charge upon impact of the projectile with the target rock. The system can include transmitters and receivers and counters to provide remote operation of projectile launch, prearming, arming and/or detonation.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.